PITTSBURGH (AP) - United States Steel Corp. will make $76 million worth of repairs and pay nearly $400,000 in fines to address air pollution at the largest coke plant in the United States.
U.S. Steel must take those actions at its Clairton Coke Works under a consent decree announced Friday by the Allegheny County Health Department.
The deal stems from smoke and particulate pollution from the largest of the mill's 12 coke oven batteries. It contains 75 of the plant's 816 coke ovens.
U.S. Steel officials did not immediately return a call on the agreement.
Coke, which is made by baking coal in large brick ovens for hours to remove impurities, is a fuel used in steelmaking.
U.S. Steel must replace the walls in the ovens by June 30, 2010. The company could also be fined by the hour for visible pollution emissions detected by a smoke monitor, and must pay a $50,000 fine if that monitor is not working 90 percent of the time, said Roger Westman, the health department's air quality manager.
''The project, estimated to cost in excess of $76 million, represents a substantial investment in air quality improvements and demonstrates U.S. Steel's commitment to long-term operations in Allegheny County,'' said health department director Dr. Bruce W. Dixon.
Health officials hope the agreement will improve the air quality in Clairton, which does not meet federal Environmental Protection Agency standards for particulate pollution.
The pollution violations were recorded by a built-in smoke monitor in the battery's main combustion stack. Other equipment designed to control particle emissions when the coke ovens are emptied failed compliance tests in 2005 and 2006, the health department said.
U.S. Steel has agreed to a $395,900 fine to settle the past violations and will pay $250 an hour for future pollution detected by a smoke monitor at the plant, Westman said. U.S. Steel will not be fined for the first 33 hours of violations each quarter, however, to allow for maintenance of the smoke monitor and other down time, he said.
The company is also paying $70,000 to control dust from the plant's roadways.